1604116645 has 8 divisors (see below), whose sum is σ = 1944785304. Its totient is φ = 1270063104.

The previous prime is 1604116637. The next prime is 1604116649. The reversal of 1604116645 is 5466114061.

It can be written as a sum of positive squares in 4 ways, for example, as 27867841 + 1576248804 = 5279^2 + 39702^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1604116645 - 2³ = 1604116637 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1604116645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1604116649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1653244 + ... + 1654213.

It is an arithmetic number, because the mean of its divisors is an integer number (243098163).

Almost surely, 2^1604116645 is an apocalyptic number.

It is an amenable number.

1604116645 is a deficient number, since it is larger than the sum of its proper divisors (340668659).

1604116645 is an equidigital number, since it uses as much as digits as its factorization.

1604116645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3307559.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 1604116645 is about 40051.4250058597. The cubic root of 1604116645 is about 1170.6093314739.

The spelling of 1604116645 in words is "one billion, six hundred four million, one hundred sixteen thousand, six hundred forty-five".